Show ViewController programmatically (not working) - swift

Question

I got a main VC called "ViewController.swift", which is bond to my ViewController Scene in Main.storyboard.
Then I want another screen, which shows when a condition in my ViewController.swift is fulfilled.
Therefore I got a Gameover.storyboard, which has a VC Scene with Storyboard ID "overID" as well as a "GameoverViewController.swift" to handle the GameOver Scene.
Here is my code in ViewController.swift, which should open Gameover.storyboards VC Scene when the condition you see below is fulfilled:
import UIKit
class ViewController: UIViewController {
var wantedLiter = 10.00
var timer : Timer?
var actualLiter = 0.00
var timerReset = true
var preisProLiter = 1.26
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
let storyBoard: UIStoryboard = UIStoryboard(name: "Gameover", bundle: nil)
let gameoverViewController = storyBoard.instantiateViewController(withIdentifier: "overID") as! GameoverViewController
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
#IBOutlet weak var preisliterLabel: UILabel!
#IBOutlet weak var euroLabel: UILabel!
#IBOutlet weak var numberLabel: UILabel!
#IBOutlet weak var numberButton: UIButton!
#IBOutlet weak var confirmButton: UIButton!
#IBAction func confirm(_ sender: Any) {
}
override func viewDidLoad() {
super.viewDidLoad()
numberLabel.text = String(round(1000*actualLiter)/1000) //initial value
preisliterLabel.text = String(preisProLiter)
// Do any additional setup after loading the view.
}
#IBAction func holdingTheButton(_ sender: Any) {
print("I am holding")
timerReset = false // reset to false since you are holding the button
guard timer == nil else { return }
timer = Timer.scheduledTimer(timeInterval: 0.005, target: self, selector: #selector(updateTime), userInfo: nil, repeats: true)
}
#IBAction func buttonReleased(_ sender: Any) {
print("button released")
if (wantedLiter == actualLiter){
print("WIN!")
actualLiter = 0;
}
//startTime = 0.00
timer?.invalidate()
timer = nil
// timerReset = true // reset to true since you released.
}
#objc func updateTime(){
//update label every second
print("updating label ")
if (wantedLiter <= actualLiter){
print("Ooops")
actualLiter = 0;
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
self.present(gameoverViewController, animated: true, completion: nil)
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
}
actualLiter += 0.01
numberLabel.text = String(round(1000*actualLiter)/1000)
euroLabel.text = String((round(100*actualLiter*preisProLiter)/100))
}
}
And now got you some Screenshots, which might help.
If you need more Screens, please ask.
Right now, I got following errors:
1) ViewController.swift in the upper part marked with "!!!!..."
Cannot use instance member 'storyBoard' within property initializer; property initializers run before 'self' is available
2) ViewController.swift
Cannot convert value of type 'gameoverViewController.Type' to expected argument type 'UIViewController'
3) ViewController.swift upper Part:
Use of undeclared type 'GameoverViewController'
This is how I changed the code:
import UIKit
class ViewController: UIViewController {
var wantedLiter = 10.00
var timer : Timer?
var actualLiter = 0.00
var timerReset = true
var preisProLiter = 1.26
let storyBoard: UIStoryboard = UIStoryboard(name: "Gameover", bundle: nil)
var gameoverViewController: GameoverViewController!
#IBOutlet weak var preisliterLabel: UILabel!
#IBOutlet weak var euroLabel: UILabel!
#IBOutlet weak var numberLabel: UILabel!
#IBOutlet weak var numberButton: UIButton!
#IBOutlet weak var confirmButton: UIButton!
#IBAction func confirm(_ sender: Any) {
}
override func viewDidLoad() {
super.viewDidLoad()
gameoverViewController = storyBoard.instantiateViewController(withIdentifier: "overID") as? GameoverViewController
numberLabel.text = String(round(1000*actualLiter)/1000) //initial value
preisliterLabel.text = String(preisProLiter)
// Do any additional setup after loading the view.
}
#IBAction func holdingTheButton(_ sender: Any) {
print("I am holding")
timerReset = false // reset to false since you are holding the button
guard timer == nil else { return }
timer = Timer.scheduledTimer(timeInterval: 0.005, target: self, selector: #selector(updateTime), userInfo: nil, repeats: true)
}
#IBAction func buttonReleased(_ sender: Any) {
print("button released")
if (wantedLiter == actualLiter){
print("WIN!")
actualLiter = 0;
}
//startTime = 0.00
timer?.invalidate()
timer = nil
// timerReset = true // reset to true since you released.
}
#objc func updateTime(){
//update label every second
print("updating label ")
if (wantedLiter <= actualLiter){
print("Ooops")
actualLiter = 0;
self.present(gameoverViewController as! UIViewController, animated: true, completion: nil)
}
actualLiter += 0.01
numberLabel.text = String(round(1000*actualLiter)/1000)
euroLabel.text = String((round(100*actualLiter*preisProLiter)/100))
}
}
(not working)
And I changed the GameoverViewController type to UIViewController.
But where was my Typo?? (G instead of g)?

Answer 1

Move the initializer for gameoverViewController into viewDidLoad or the like and make gameoverViewController an optional or implicitly unwrapped optional (that's the ! after a type)
Should be fixed by 1.
Please show the source for GameoverViewController if this is not fixed by 1. too.